When working on web design it is important to make sure you create it for an audience with a diverse range of "tech-savviness". Have you made sure that your site and its content is visible for your audience? Is the information easy to find and in an obvious place? How many clicks do users need to make to get to where they need to go? Have you made sure your design is consistent and visually appealing?
All of these factors will determine how your site is navigated by others and how your students engage in the learning on the site. After all, you want to make sure you limit the amount of time students spend trying to access their learning, so that they have as much time as possible to get stuck into their activities.